Cranial Nerves

CN I and function

olfactory

smell (from olfactory epithelium)

somatic motor

carry commands from CNS to skeletal muscles

somatic sensory

carry information from body receptors to the CNS

special sensory

senses that have specialized organs devoted to them

visceral motor (parasympathetic)

regulates involuntary body functions

rest, digest, heart rate

visceral sensory

detect and transmit body signals from organs, bv, and glands to CNS

CN II and function

optic

vision (from retina)

CN III

oculomotor

somatic motor of CN III

all extraocular mm except for lateral rectus and superior oblique

CN III visceral motor

sphincter pupillae and ciliary mm

constricts pupils and accommodates lens

CN IV

trochlear

somatic motor= superior oblique

CN V1

Ophthalmic

CN VI somatic sensory

cornea

skin of forehead

scalp

eyelids

nose

mucous of nasal cavity and paranasal sinuses

CN V2

maxillary

CN V2 somatic sensory

skin of face over maxilla including

upper lip

maxillary teeth

mucosa of nose

maxillary sinuses

palate

CN V3

mandibular

CN V3 somatic motor

muscles of mastication

mylohyoid anterior belly of digastric, tensor veli palatini

tensor tympani

CN V3 somatic sensory

skin over mandible, including lower lip, side of head, mandibular teeth, temporomandibular joint, mucosa of mouth, anterior two thirds of tongue

CN VI

Abducens

CN VI somatic motor

lateral rectus

CN VII

facial

CN VII somatic motor

muscles of facial expression

occipito-frontalis

stapedius

stylohyoid

posterior belly of digastric

CN VII somatic sensory

skin of external acoustic meatus

CN VII special sensory

tase from anterior 2/3 of tongue and palate

CN VII visceral motor (parasympathetic)

submandibular and sublingual glands

lacrimal glands

gland of nose and palate

CN VIII

vestibulocochlear

CN VIII special sensory

hearing (from cochlea)

balance (semicircular canals)

CN IX

glossopharyngeal

CN IX somatic motor

stylopharyngeus

CN IX somatic sensory

external ear

middle ear

pharynx

posterior 1/3 tongue

CN XI special sensory

taste from posterior 1/3 of tongue

CN XI visceral motor

parotid gland

CN XI visceral sensory

carotid body and sinus

CN X

Vagus

CN X somatic motor

pharyngeal constrictors

intrinsic muscles of larynx

all muscles of the palate (except tensor veli palatini)

striated muscle in superior 2/3 of esophagus

CN X somatic sensory

auricle

external acoustic meatus

dura mater of posterior cranial fossa

CN X special sensory

taste from epiglottis and palate

CN X visceral motor (parasympathetic)

smooth muscle of trachea

bronchi

digestive tract

cardiac muscle of heart

CN X visceral sensory

base of tounge

pharynx

larynx

trachea

bronchi

heart

esophagus

stomach

intestine

CN XI

accessory

CN XI somatic motor

trapezius

sternocleidomastoid

CN XII

hypoglossal

CN XIII somatic motor

all intrinsic and extrinsic mm of tounge except palatoglossus